﻿// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

using System;
using System.Collections.Generic;
using ICSharpCode.Core;

namespace ICSharpCode.SharpDevelop.Parser
{
	/// <summary>
	/// Combines other assembly searchers in a chain.
	/// </summary>
	public class CombinedAssemblySearcher : IAssemblySearcher
	{
		readonly List<IAssemblySearcher> searcherList;
		
		public CombinedAssemblySearcher(params IAssemblySearcher[] searchers)
		{
			searcherList = new List<IAssemblySearcher>();
			
			if ((searchers != null) && (searchers.Length > 0)) {
				searcherList.AddRange(searchers);
			}
		}
		
		public void AddSearcher(IAssemblySearcher searcher)
		{
			if (searcher == null)
				throw new ArgumentNullException("searcher");
			searcherList.Add(searcher);
		}
		
		public void RemoveSearcher(IAssemblySearcher searcher)
		{
			if (searcher == null)
				throw new ArgumentNullException("searcher");
			searcherList.Remove(searcher);
		}
		
		public FileName FindAssembly(DomAssemblyName fullName)
		{
			FileName foundFileName = null;
			// Run through all searchers until we find something
			foreach (var searcher in searcherList) {
				if (searcher != null) {
					foundFileName = searcher.FindAssembly(fullName);
					if (foundFileName != null)
						break;
				}
			}
			
			return foundFileName;
		}
	}
}
